8237182(T): Update copyright header for shenandoah and epsilon files

[Mikael Vidstedt]

Igor & Zhengyu,

Thanks for the reviews!

Cheers,
Mikael

> On Jan 14, 2020, at 7:11 PM, Zhengyu Gu <zgu at redhat.com> wrote:
> 
> Looks good to me.
> 
> Thanks for fixing it.
> 
> -Zhengyu
> 
> On 1/14/20 7:18 PM, Mikael Vidstedt wrote:
>> Please review this small change which adjusts the copyright headers for shenandoah and epsilon related files.
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8237182 <https://bugs.openjdk.java.net/browse/JDK-8237182>
>> webrev: http://cr.openjdk.java.net/~mikael/webrevs/8237182/webrev.00/open/webrev/ <http://cr.openjdk.java.net/~mikael/webrevs/8237182/webrev.00/open/webrev/>
>> Description:
>> Many/most of the shenandoah and epsilon related files are missing the following line in the copyright header:
>> "DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.”
>> This change simply adds that line to the relevant files. In src/hotspot/share/gc/shenandoah/shenandoahNormalMode.cpp there was also a missing empty line before one of the paragraphs in the header.
>> Cheers,
>> Mikael
>